Seiko Astron

The Seiko Astron, reference SSH109J1, is a GMT watch with a 42.7 mm titanium case. The watch has world time, a perpetual calendar and a power reserve indicator. The case is 12.2 mm thick, with a lug-to-lug measurement of 48 mm and a water-resistance rating of 100 metres. Solar-powered calibre 5X53 contains 12 jewels and operates for approximately 6 months when fully charged. A three-fold clasp with push-button release and fine adjustment fastens the watch. The hands and indices carry LumiBrite. Movement accuracy is plus or minus 15 seconds per month without signal reception at temperatures between 5 and 35 degrees Celsius. A sapphire crystal with a Super Clear coating covers the dial.